Electric rotary fan



(No Model.) 2 Sheets-Sheet 1.

J. F. DENISON. ELBGTRIO ROTARY PAN.

Patented May 30, 1893.

W m J (No Model.) 2 Sheets-Sheet 2.

J. F. DENISON.

ELECTRIC ROTARY FAN.

No. 498,462. Patented May 39. 1893.

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- mummy WITNESSES m VENTOf? 4 M. -QeW/a ,4 TTORNEYS UNiTnn STATES PATENT amen.

JULIAN F. DENISON, ()F NElV HAVEN, CONNECTICUT, ASSIGNOR TO THE BAOKUS \VATER MOTOR COMPANY, OF NE\VARK, NEW JERSEY.

ELECTRIC ROTARY FAN.

SPECIFICATION forming part of Letters Patent No. 498,462, dated May 30, 1893.

' Application filed March 15, 1892. Serial No. 424,945. (No model.)

To all whom, it may concern:

Be it known that I, JULIAN F. DENISON, a citizen of the United States, and a resident of New Haven, New Haven county, Connecticut, have invented certain new and useful Improvementsin Electric Rotary Fans, of which the following is a specification.

This invention relates to improvements in rotary fans, and especially in the devices for supporting and driving the same.

The invention consists in the combination with a motor, of a pulley on the shaft of the motor, a plate in engagement with the pulley on the motor shaft and fan blades operated from said plate.

The invention also consists in the construction and combination of parts and details which will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation of myimproved hanger and driving gear for rotary fans, parts being broken out. Fig. 2 is a vertical longitudinal sectional view of the upper part of the same, parts being broken out. Fig. 3 is a transverse-sectional view of the lower part of the same. Fig. 4 is a side-view of the driving mechanism and part of the hanger, showing that side opposite the one shown in Fig. 1, and Fig. 5 is a vertical longitudinal sectional view through the motor and hanger.

Similar letters of reference indicate corresponding parts.

The approximately circular frame A, which serves for receiving the fan driving mechanism, is connected with the suspending rod B by means of a flexible piece 0, preferably made of leather, one end of which is inserted in the lower end of the rod B and the other end of which is inserted in a suitable opening in the top of the frame A, the ends of said flexible piece 0 being securely riveted to the rod B and frame A. This flexible piece prevents the transmitting of vibratory motion from the circular frame A to the suspending rod, and also electrically insulates the motor from the suspending rod. The suspending rod B is provided at its upper end with a hook a, which engages a hook Z) secured in the ceiling or other support, or the upper end of the rod B is provided with a screw threaded projec tion d, which is screwed into the threaded socket of a plate f that is fastened by a lag screw g to the ceiling or other support. The suspending rod B is provided directly below the screw-threaded part (Z with a hexagonal or other polygonal collar 7L, to permit of applying a wrench or key for screwing the suspending rod B into said plate f. The electrical conducting wires 7o pass through suitable apertures into the hollow rod B and pass through the same to the motor, that will be described hereinafter.

The frame A is provided at its bottom with a neck D and a shoulder E, upon which a step ring F is placed. A shaft G is passed longitudinally through the neck D and has its upper end held in the hub ll of the spider frame J, which hub ll rests on the step ring F. To the ends of the arms of the spider frame J a plate L is secured, or, as shown, said plate is made integral with the spider frame. Below the neck D a hub M is held firmly on the shaft G, so as to turn with the same, and is provided with arms N, to which fan blades 0 of any approved construction are fastened in any well known manner.

The electric motor, constructed with the usual field magnets P and armature Q, has the pole pieces B. R firmly connected with the field magnets, which pole-pieces, with the field-magnets, form the frame of the motor. The frame A is provided with two lugs S, through which pivots S pass that enter apertures in a projecting part of the upper pole piece R, which projecting part fits between the lugs S, whereby the frame of the electric motor is pivoted in the frame A. At the opposite side of the frame A aspring T rests on the upper pole piece R, and on said spring an adjusting screw T bears, that passes through a lug T projecting from the frame A. The shaft 7 of the electric motor carries a pulley V covered with leather or other suitable frictional material, which pulley rests upon the top of the plate L. The pulley V is pressed upon the plate L by the weight of the pivoted motor and also by the action of the spring T, thus insuring perfect frictional contact, whereby the slipping of the pulleys is absolutely prevented.

Y are the carbon brushes and Y the brush holders.

The operation is as follows:-Wl1en the our rent is admitted into .the motor the armature Q and its shaft WV are rotated, as is also the pulley V on said shaft. As said pulley V is in frictional contact with the upper surface of the plate L, said plate L is also rotated, and as this plate is connected with the shaft G carrying the fan blades, the same are rotated and produce a current of air. At the same time the high speed of the electric motor is reduced, as the diameter of the plate L is much greater than the diameter of the pulley V on the motor shaft. The rotary motion on a horizontal axis produced in the armature of the motor is thus converted into a rotary motion on a vertical axis by gearing which is absolutely noiseless and not apt to get out of order, as the spring T and the weight of the motor keep it in close contact. As shown in Fig. 5, the motor and the frame A are surrounded by an ornamental casing or basket 8.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a frame,of a motor held in the same, a shaft driven by said motor, a pulley fixed on said shaft, a rotative plate in engagement with said pulley and fanblades connected with and operated from said rotative plate, substantially as set forth.

2. The combination, with a frame, of a motor hinged in the same, a pulley on the shaft of said motor, a rotative plate mounted in the frame to rotate on an axis at right-angles to the axis of the motor shaft, with which plate the pulley on the motor shaft is in frictional contact, and fan-shafts connected with and operated from said rotative plate, substantially as set forth.

3. The combination, with aframe, of a motor hinged in the same, a spring bearing on said motor, a pulley on the shaft of the motor, a rotative plate engaged with said pulley and mounted to rotate in the frame and fan-shafts connected with said rotative plate, substantially as set forth.

4. The combination, with a frame, of a 1110- tor hinged in the same, a spring bearing on said motor, a screw mounted in part of the frame and bearing on said spring, a pulley mounted on the shaft of the motor, a rotative plate mounted in the frame and engaged with the pulley on the motor shaft and fan-blades connected with said rotative plate, substantially as set forth.

5. The combination with a frame, of a motor in the same a fan driven from said motor, a hanger rod and a flexible insulating piece connected with the frame and the hanger rod, substantially as setforth.

6. The combination with a frame, of a rotative plate having a hub resting on part of the frame, a shaft connected with said rotative plate, fan blades on said shaft and a motor in the frame for rotating said rotative plate, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

JULIAN F. DENISON.

Vitnesses:

EDWARD G. BUCKLAND, GEORGE D. WATRoUs. 

